Dem Clustering Simplification Algorithm Based On Fractal Dimension,
2020
College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
Dem Clustering Simplification Algorithm Based On Fractal Dimension, Zhang Fan, Xiaoyang Li, Liu Huan, Hu Wei, Li Wei
Journal of System Simulation
Abstract: Fractal is the essential characteristic of natural scenes. It can describe the irregular extent of surface topography, so it is used for digital terrain generation. As the inverse process of terrain generation, digital terrain simplification usually uses geometric properties such as curvature index as a measure to reduce the grid to improve the efficiency of electromagnetic solver calculations, flood modeling, visual simulation and other issues, while ignoring the fractal nature of the terrain features. Since a traditional simplification algorithm of DEM is difficult to identify the characteristics of complex topography, a new clustering simplification algorithm based on fractal dimension …
Simulated Training System Of Shipborne Helicopter Deck-Landing Command,
2020
Dalian Navy Academy, Dalian 116018, China;
Simulated Training System Of Shipborne Helicopter Deck-Landing Command, Jianguo Wang, Qun E, Xiaogang Xu, Keming Yao, Xinlong Wan
Journal of System Simulation
Abstract: Ship borne helicopter landing on the deck is a complex and dangerous process, and the capability of the deck landing commanders has much influence to the helicopter landing safety. The environment system of ship borne helicopter deck landing was constructed, such as wave simulation, ship rocking simulation and assist deck landing lighting system. The ship borne helicopter landing simulation training system was designed and realized, including command gesture data acquisition, gesture recognition, etc. According to the characteristic of ship borne helicopter landing command, the system applied the gesture capture technology to the landing command training. The application indicates that …
Characteristics Study Of Internal Gas-Liquid Two Phase Flow Field Of Three Layers Of Air Stirred Tank Reactor,
2020
1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China;;
Characteristics Study Of Internal Gas-Liquid Two Phase Flow Field Of Three Layers Of Air Stirred Tank Reactor, Xiaodong Hu, Dexin Zhang, Jiang Rong, Zenghui Wu, Tian Qiang
Journal of System Simulation
Abstract: The fluid dynamics and the gas-liquid distribution character in a three-layer stirred tank reactor with 2KSX (four wide blade propeller type stirrer) and PDT (parabolic disc turbine) were analyzed with the MRE (multi-reference frame) method based on Euler-Euler and population balance models. The total and local gas-hold were calculated. The conclusions show that: axial flow was produced by double stir upper KSX with radial flow produced by the third layer of PDT, gas-hold was improved with double-upper-layer stirrers axial driven and the lowest stirrer axial driven, gas-hold increased with the stirred time going on, which would not be extended …
Research On Scheduling Problem Of Single-Arm Cluster Tools With Residency Time Constraints,
2020
1. Liaoning Police College Academy, Dalian 116036, China;;
Research On Scheduling Problem Of Single-Arm Cluster Tools With Residency Time Constraints, Lu Rui, Linying Li
Journal of System Simulation
Abstract: Considering the scheduling model and schedulibility for single-arm cluster tools with wafer residency time constraints, a mixed- integer linear programming model with both single-arm and temporal constraints for processing module was constructed. The rationality of equivalent processing time for concurrency module was theoretically proved. Based on this, the periodic wafer processing and transportation procedure for both single-arm and processing module was analyzed. Meanwhile, the schedulibility conditions for cluster tools were proved. The simulation experiments were carried out to test the model and schedulable conditions, and the results reveal the validity and feasibility of the presented model.
Low-Complexity Soft-Decision Decoding Algorithm For Bch Code In Beidou System,
2020
1. Yantai Nanshan University, Yantai 265713, China;;
Low-Complexity Soft-Decision Decoding Algorithm For Bch Code In Beidou System, Guowei Qu, Songfeng Deng
Journal of System Simulation
Abstract: A low-complexity soft-decision decoding algorithm based on the re-encoding technique was proposed for the BCH(15,11) code in BeiDou satellite navigation system. Several candidate information sequences were constructed by the soft-decision vector and then re-encoded in the algorithm if the error in the hard-decision result was detected. The correlation between each codeword and the soft-decision vector was calculated, and the codeword with the maximum correlation value was selected as decoding output. Simulation results show that the presented algorithm outperforms traditional hard-decision decoding at the expense of moderate complexity increase. Moreover, the storage of error-correction ROM signal is avoided. …
Study On Hand Gesture Recognition And Portfolio Optimization Model Based On Svm,
2020
College of Engineering and Design, Lishui University, Lishui 323000, China;
Study On Hand Gesture Recognition And Portfolio Optimization Model Based On Svm, Zhiwei Cai, Shuyan Wu, Junfeng Song
Journal of System Simulation
Abstract: Hand gesture recognition was researched. The idea of extracting related features was proposed by using SVM algorithm in machine learning domain, and combination optimization method was used, which consists of ANN, HMM and DTW, to do hand gesture recognition. The experimental results show that portfolio optimization model based gesture recognition method has high accuracy and is very effective.
Vehicle Routing Optimization Model Of Cold Chain Logistics Based On Stochastic Demand,
2020
1. Logistics School, Beijing Wuzi University, Beijing 101149, China;;
Vehicle Routing Optimization Model Of Cold Chain Logistics Based On Stochastic Demand, Xiangguo Ma, Tongjuan Liu, Pingzhe Yang, Rongfen Jiang
Journal of System Simulation
Abstract: The costs of vehicle distribution in the process of cold chain logistics is analyzed and amended; A mathematical model with mixing time window is built to balance the customers' service request with importance level; To minimize the total cost, a mathematical model which uses a factor to make balance between the stability of customer demand fluctuation and the cost increase in the assignment phase is established. Based on MATLAB software, the optical solution is found with adaptive genetic algorithm by taking the background of a distribution center to simulate and analyze.
Phy Security Transmission Based On Antenna Selection And Artificial Noise,
2020
1. Guangzhou Panyu Polytechnic, Guangzhou 511483, China;;
Phy Security Transmission Based On Antenna Selection And Artificial Noise, Deng Dan, Wang Wei, Zhao Ming
Journal of System Simulation
Abstract: A physical-layer security enhancement scheme based on antenna selection and artificial noise (ASAN) was proposed. In broadcast phase, the Relay node selected the optimal antenna subset, and transmitted the beamforming matrix and artificial noise vector simultaneously. Simulation results show that the ASAN scheme outperforms classical beamforming scheme. Compared with beamforming scheme, the proposed scheme shows about 2.5dB gain in ergodic secrecy capacity when antenna number of Relay is three, and 3dB gain when the antenna number is six. Specifically, the combined selection criterion shows the similar curve compared with the one-direction criterion, in which the Relay only needs the …
Modeling And Simulation Of Executable Architecture Based On P-Devs,
2020
1. College of Electronic and Electrical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;;2. Dept. of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
Modeling And Simulation Of Executable Architecture Based On P-Devs, Jianpeng Hu, Linpeng Huang
Journal of System Simulation
Abstract: Executable architecture modeling plays a vital role in the design of complex systems and System of Systems (SoS), but there is still no common view and standard, unified execution mechanism and environment for an executable architecture. Three major elements of executable architecting were analyzed and summarized with a comparison among the options of these elements. To realize automated transformation from graphical models to executable codes, a generic modeling approach to executable architecture of SoS based on Parallel Discrete Event System Specification (P-DEVS) was proposed, and a case study of airport SoS shows its feasibility and effectiveness.
Coupling Sph Model For Occupant Evacuation In Fires And Simulation,
2020
1. Department of Management, The Chinese People's Armed Police Forces Academy, Langfang 065000, China;;
Coupling Sph Model For Occupant Evacuation In Fires And Simulation, Zhihong Miao, Zhihui Li
Journal of System Simulation
Abstract: Computer simulation of evacuation can be very helpful in building design for fire protection and reducing casualty in compartment fire. A coupling model for occupant evacuation building fires was proposed. A continuous model was composed by treating pedestrians movement as fluid movement, and by using Smoothed Particle Hydrodynamics method to discretize this continuous model, the model was transformed into a particle system. A method for coupling FDS into the occupant evacuation model was proposed, and the amounts of smoke density and smoke charge of pedestrian were used to determine the move direction of a pedestrian and …
Topology Modeling Of Information Grid Network For Military Applications,
2020
Information Engineering University, Zhengzhou 450001, China;
Topology Modeling Of Information Grid Network For Military Applications, Mingqing Zhang, Meilin Wei, Hongshan Kong, Shuqin Dong
Journal of System Simulation
Abstract: For the lack of military network topology research and incomprehensive consideration of topology modeling factors, a topology modeling method of information grid network for military applications was proposed. AS-level and router level topology generation algorithms were designed. A seamless integration scheme between two topologies was proposed. Simulation experiments about meeting the conditions for the topological properties and topology model deployment strategy in network simulation environment were implemented. The simulation results show that the information grid network can be remained stable in the overall nature with considering the growth, death, “preferential attachment”, invulnerability and other factors of …
Simulation & Analysis Of Liquid Metal Conical Helical Antenna,
2020
1. School of Information Science and Technology, Dalian Maritime University, Dalian 116026, China;;2. School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116021, China;
Simulation & Analysis Of Liquid Metal Conical Helical Antenna, Zhou Yun, Shaojun Fang, Shiqiang Fu, Zhongbao Wang
Journal of System Simulation
Abstract: In order to replace the solid metal antenna, a novel liquid metal conical helical antenna was presented. The antenna is easy to adjust its shape. The circularly polarized antenna has the characteristics of small size, high gain, wide bandwidth, and it is easy to reconstruct. Taking maritime satellite communications as an example, the proposed antenna was designed, simulated and optimized for antenna impedance matching with HFSS software, and a good circularly polarized radiation and impedance characteristics for the antenna were obtained. The simulated results show that: in the entire maritime satellite communication work band (1 525-1 660.5 …
Study On Comprehensive Performance Of Roadheader Shovel Based On Simulation Optimization Method,
2020
School of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China;
Study On Comprehensive Performance Of Roadheader Shovel Based On Simulation Optimization Method, Dayong Wang, Wang Hui
Journal of System Simulation
Abstract: An improved genetic algorithm that integrates into non-uniform mutation operator and niching technology, which could run toward the optimal solution effectively, and to better maintain the diversity of the solution and high convergence speed was proposed. Meanwhile, taking shovel width and shovel dip for design variables optimizes loading capacity, shovel grubbing force and shovel coaming thickness of roadheader shovel. Optimization results show that: shovel width is reduced by 1.33%, shovel dip is reduced by 9.47%, and Shovel coaming thickness is increased by 11.4%, which has a significant effect on the overall stability of roadheader and the shovel strength. …
Dgetmw: Motion Video Tracking Based On Memory Watershed Disc Gradient Expansion Template,
2020
School of Electrical and Information Engineering, Anhui University of Science & Technology, Huainan 232001, China;
Dgetmw: Motion Video Tracking Based On Memory Watershed Disc Gradient Expansion Template, Wei Wei, Kongping Wu, Laigong Guo, Qin Meng
Journal of System Simulation
Abstract: In order to obtain ideal detection results of moving object, a new video moving object detection algorithm based on labeling watershed and detection algorithm and morphology were proposed. The image was pre-processed by diffusion model to eliminate noise interference on object detection, and the difference algorithm was used to extract outline of moving object.. Morphological operations were used to process the target outline, and marked watershed algorithm was used to segment moving object and performance was tested by simulation experiments. The simulation results show that the proposed algorithm can prevent over segmentation problems and accurately detect moving object …
Research Of Satellite Tactical Communication Network Routing Protocol Simulation Based On Tdma,
2020
School of Computer Science and Engineering, Xi'an Technological University, Xi'an 710021, China;
Research Of Satellite Tactical Communication Network Routing Protocol Simulation Based On Tdma, Yanfang Fu, Li Lu, Gao Xiang, Cheng Bing
Journal of System Simulation
Abstract: In order to build a globally oriented efficient and seamless tactical communication network system, on the research of satellite and mobile communication network technology, using simulation software OPNET Modeler, a TDMA model and unique tactical communications network was designed. Its main feature is full-completion five layers network model which can satisfy the function of each network level, also provides a reliable basis for later work. After compared with DSR routing, the hierarchical routing shows some advantages in simulation. Some valuable conclusions were drawn, which can provide objective, reliable information for network planning and design.
Simulation Of Performance Optimization Control About Transcritical Co2 Automotive Air Conditioning System,
2020
1. Computer College, Jilin Normal University, Siping 136000, China;;3. College of Automotive Engineering, Jilin University, Changchun 130025, China;
Simulation Of Performance Optimization Control About Transcritical Co2 Automotive Air Conditioning System, Jinghua Zhao, Tao Jing, Fangxi Xie, Kainan Zhao
Journal of System Simulation
Abstract: According to the researching data of certain corporate, a semi-theoretical model of the transcritical CO2 automotive air conditioning system was established using AMESim Software. The research was carried out successively from the aspects of thermodynamics, system performance analysis and optimal control, in order to ensure that the coefficient of performance (COP) reached its maximum. According to the results of exergy loss analysis and performance analysis, the fuzzy PID controller was designed. Under the interference of the ambient temperature change, the controller could control high pressure to ensure COP reach its maximum. The comparison with the well-tuning PID controller …
Slashing Quality Index Modeling And Simulation Based On Data Dispersion Clustering,
2020
1. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;;
Slashing Quality Index Modeling And Simulation Based On Data Dispersion Clustering, Yuxian Zhang, Xiaoyi Qian, Dong Xiao, Jianhui Wang
Journal of System Simulation
Abstract: For the sensitivity of noise and outliers data in the typical partitioning clustering algorithm, a clustering algorithm based on data dispersion was proposed. The data dispersion was defined and introduced to a non-Euclidean distance. The similarity metric was established, and the data clustering was realized. The optimal clustering number was obtained by the validity function based on improved partition coefficient. Then the proposed clustering algorithm was applied to quality index model in slashing process. A size add-on quality index model was built by radial basis function neural networks. The node number of hidden layer was determined and the center …
Nonlinear H∞ Control For Marine Speed With Parameter Perturbation And Ambient Interference,
2020
1. Reliability Engineering Institute, School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China;;2. Key Laboratory of Marine Power Engineering ? Technology (Ministry of Communications), Wuhan University of Technology, Wuhan 430063, China;;3. National Engineering Research Center for Water Transport Safety, Wuhan University of Technology, Wuhan 430063, China;;
Nonlinear H∞ Control For Marine Speed With Parameter Perturbation And Ambient Interference, Yupeng Yuan, Zhang Meng, Xinping Yan, Guo Bo, Jianglong Wan
Journal of System Simulation
Abstract: In order to improve the automation level and enhance the navigation safety of ships, stable control for ship speed is very important. Good control effect is difficult to obtain based on the conventional control method since the marine speed control system is a time-varying parameters and nonlinear complicated propulsion system. The uncertainty of the system parameters and the effect of environment such as winds, waves and currents were considered adequately in ship motion mathematical model with disturbing force. The mathematic model was linearized accurately with the differential geometry method. Then the nonlinear H∞ controller was designed according to …
Underground Wireless Channel Bandwidth And Capacity,
2020
Purdue University
Underground Wireless Channel Bandwidth And Capacity, Abdul Salam, Usman Raza
Computer Information Technology Faculty Publications
The UG channel bandwidth and capacity are vital parameters in wireless underground communication system design. In this chapter, a comprehensive analysis of the wireless underground channel capacity is presented. The impact of soil on return loss, bandwidth, and path loss is discussed. The results of underground multi-carrier modulation capacity are also outlined. Moreover, the single user capacity and multi-carrier capacity are also introduced with an in-depth treatment of soil texture, soil moisture, and distance effects on channel capacity. Finally, the chapter is concluded with a discussion of challenges and open research issues.
Underground Phased Arrays And Beamforming Applications,
2020
Purdue University
Underground Phased Arrays And Beamforming Applications, Abdul Salam, Usman Raza
Computer Information Technology Faculty Publications
This chapter presents a framework for adaptive beamforming in underground communication. The wireless propagation is thoroughly analyzed to develop a model using the soil moisture as an input parameter to provide feedback mechanism while enhancing the system performance. The working of array element in the soil is analyzed. Moreover, the effect of soil texture and soil moisture on the resonant frequency and return loss is studied in detail. The wave refraction from the soil–air interface highly degrades the performance of the system. Furthermore, to beam steering is done to achieve high gain for lateral component improving the UG communication. The …
